pəˈräksə̇ˌsōm noun
( -s )
Etymology: peroxi de + -some (III)
: a cytoplasmic cell organelle that contains catalytic enzymes (as catalase) which act in oxidative reactions and especially in the production and decomposition of hydrogen peroxide
• per·oxi·som·al -ˌräksə̇¦sōməl adjective